To evaluate the results of the TRAFIX instrumentation in correcting s coliosis. Methods. Since October 1997

47 patients with scoliosis received spinal fixation with the TRAFIX instrumentation at the Peking Union Medical College Hospital. T he average age was 14.3 years （range 10 to 38 years）. There were 27 idiopathic c ases

16 congenital cases

2 cases with Marfan syndrome and 2 with neurofibromat osis. Twelve of the 47 patients underwent anterior release

while 4 patients rec eived the revision approach. The average follow up time was 26 months （13～38 m onths）. Results. The measurements of primary coronal deformity before and after surgery were 74°（50°～115°） and 38.7° （11°～95°）

respectively. The average curve correction was 54%. The average number of fused segments was 12.5 （7～17） verte brae. The distance between the center of apex and the C7 plumb line was 56.8 mm before surgery （25～107mm） and 31 mm after surgery （10～87mm）. Conclusion. The TRAFIX instrumentation provides three dimensional correction wi th refinement

convenience and reliable fixation.